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bdh2991
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Homework Statement
An RL circuit has a 60V battery, a 42H inductor, a 24Ω resistor and a switch, all in series. Initially the switch is open and there is no magnetic flux in the inductor. At t=0 the switch is closed. When the inductor voltage is 24 V, the time t is closest to?
Homework Equations
i(t) = I(1-e-t/[itex]\tau[/itex])
[itex]\epsilon[/itex]=IR
The Attempt at a Solution
i'm confused by this problem for some reason but what i tried to do was set 60/24 to solve for initial current but i guess if this is a growth problem so I'm not sure what else to do...the answer i got was t=0.9s but i know that's not right